Well-tubing safety appliance.



S. A. GUIBERSON, JIM, WELL TUBLNG SAFETY APPLIANCE APPLICATION FILED B13020, m1. 1 0301384, I Patented June 18, 1912.

2 SHEETS SHEET 1 5 v 11 1 HZ S. A. GUIBERSON, JR. WELL TUBING SAFETY APPLIANCE.

APPLICATION FILED DEG. 20/1911.

1,@3Q,8% Patented. June 18, 1912 2'SHEETSSHEBT 2.

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SAMUEL ALLEN GUIBEBSbN, JR., F COALINGA, CALIFORNIA.

WELL-TUBING SAFETY APPLIANCE.

' Specification of Letters Patent. Application filed December 20, 1911. Serial No. 666,949.

PatentedJune 18, 1912.

To all whom it may concern.

Be it known that I, SAMUEL ALLEN GUI- BERSON, J r., a citizen of the United States,

residing at Coalinga, in the county of Fresno and State 'of California, have inm paratus and particularly to means vented certain new and useful Improvements in Well-Tubing Safety Appliances, of

which the following is a specification.

My invention relates to we'll-pumping zipguarding against the injury and loss which follow the unintentional dropping of the tubing, due to breakage or to any other cause.

My invention consists in the novel safety appliance which I shall hereinafter fully describe.

The object of the invention is to afford a sim le and effective clutch device for the tubmg to prevent it from dropping, said device being such as not to interfere with the lifting of the tubing out of the casing, and also tl-S/IiOi) to interfere with the free passage of the sand which enters the casing with the oil.

Referring to the accompanying drawings-Figure 1 is .a, vertical sectional view showing my safety-appliance in position ready to be released, so that it may assume a position of what I may term functional readiness. Fig. 2 is a similar view showing it in its position of functional readiness,

that is, a position in which, when the occasion arises, it will perform its intended function. Fig. 3 is a top plan view of the appliance, the casing being in horizontal cross section. Fig. .lcrlS an elevation of the device. Fig. 5 is a plan of the bendable guide 21. Fig. 6 is an edge elevation of the locking and tripping device.

l is the well casing.

2 is the tubing, and dis the pump barrel.

Connected with the lower end of the pump barrel is the tubular'stock i of the safetyappliance. The eitterior of the stock is formed with bosses 5 on opposite sides, so that the stock hastwo diameters, namely, a longer one through the bosses, which diameter is such 'as to cause the stock to somewhat nicely fit the casing 1 on two sides,

and the other diameter, a shorter one through said stock at right'angles to the lon er diameter, thereby leaving channels indlcated at 6 in Fig. 3, between said stock and the casing walls, which channels permit the free passage of the sand which heaves up in the casing.

In each boss 5 is madea seat 7 for a gripper slip '8. The seat is an inclined "plane deepening downward, and the connection of the slip with its seat, thou h it may be of any nature adapting it to sli' e, is

best made as a dovetail slip joint, as indicated at 9. The outer face of the slip 8 may be of any suitable character, but in practice it is best made with teeth 10 which give a biting contact. The relation of the inclinedplane seats 7 and the gripper slips 8 is such that when the latter are moved down close M to the foot of the seats the faces of said slips will lie safely inside of the circumference of the faces of the bosses,-as seen in Fig. 1, so that in this position the device may be freely lowered into the casing. But as the slips move upward on their inclined plane seats their faces will reach the circumference of the boss faces and beyond said circumference and will lie against the inner wall of the casing, as seen in Fig. 2. Any pressure downward on the stock 4 will thereafter tend to cause theslips 8 to rise still further, in which endeavor they will obviously grip the casing with a bite the strength of which is proportionate to the pressure downward.

In order to preliminarily lock the gripper slips in their non-functional position, so that the device may be lowered into the casing, and then to release or trip them, to

place them in operative position or func tional readiness, I- have the following trip lock which in this connect-ion Ideem particularly effective. i

In a socket in the base of each gripper slip 8 is seated freely a nut 11 with which the threaded upper end of a .holding rod 12 engages, said upper 'end passing freely into the slip through an elongated slot 13 so that the rod can adjust itself, together with the freely seated nut 11, to the longitudinally inclined movement of the slip. The rod 12 passes through a hole 14 in the boss 5 and has an .eye 15 on its end. A spring I6 seated around the rod and bearing between a shoulder 17 in the hole 14 of the boss 5 and the base of the gripper slip, servesto throw the slip up to functional readiness.

Within the stock 4 of the appliance are two trip arms 18, the inner ends of which are ,pivotally connected with a head stem 19 when the locking device is being drawn up,

pass through the pump barrel and tubing, which are of smaller diameter than the diameter of the stock. For this purpose I deem frame work, as here shown, made of bendable wire, as a good construction for the guide. r

A description of the use and o eration of the safety appliance will give a ull understanding of the invention. The-safety-ap- ,pliance 1S first set in its primary inoperative condition, in which, as seen in Fig. 1, the

gripper slips 8 are held down to their lower limits by the engagement of the trip arms 18 with the eyes 15 of the rods 12. In this position, as before stated, the faces .of the slips 8 do not project from the faces of the stock bosses 5, so that the device may pass down into the casing. The stock. 4 being now connected with the lower end of the pump barrel 3, and the latter being connected with the tubing 2, all these parts are lowered into the casing tothe point desired and are supported in proper manner. Now before thepump piston and its sucker rods are dropped down through the tubing, it is the intention to trip'the safety appliance, so that its slips may move to a position of functional readiness.

' Any suitable means of reaching the head stem'lQ of the trip arms 18 may be employed. The way I propose is by the wire sand-line with a common sucker rod socket on its lower end. This is drop ed down until it engages the upper end 01 the head stem 19 of the trip arms 18. Then by a pull on the wire line, the hinged trip arms 18 are withdrawn from their engagement with the eyes 15 of the holding rods 12, and thereupon the gripper slips 8 under the pressure of their springs 16 move upward and outward to a contact with the casing walls, as seen in Fig. 2. In this condition, they are not intended to afford support to the pump and tubing, which are otherwise borne, but it is apparent that any downward pressure would at once cause the slips 8 to bite into the casing walls, and 'thus the safeguard against the dropping or fall of the. tubing, which is the object sought, is attained. The device will, however,-readily pull up through the casing. The trip arms 18 with, their head stem 19, and the bendable guide 21 of the latter which held the stem with accu- I claim' as new and desire to secure by Letters Patent is- 1. A .well-tubing' safety-appliance com prising a hollow stock adap to pass into the well casing. and having means for connecting it with the tubing; gripping devices carried by the stock for engagln thewell casing; and means for holding sai ippingdevices inoperative and releasing t em for action, consisting of hinged trip arms within the stock, their ends projecting through and ads ted to bewithdrawn from holesin the stoc walls, members connected with the gripping devices, with which the ends of the trip arms engage, anda liftable head stem within the stock to which the trip arms are hinged. j s

2. A well-tubing safety-appliance ,com-

prising ahollow stock adapted to pass into l the well casing and having means for connectin it with, the tubing; gripping devices g the well carrie by the stock for engagin casing; and means for holdingsai ipping devices inoperative and releasing t erii' for acting, consisting of hinged trip arms within'the stock, their ends projecting through and adapted to be withdrawn from holes in v the stock walls, members connected with the gripping device, with which the ends of the triparms engage, a liftable head stem with in the stock to which the trip arms are hinged; and bendable guide upon said headstem to h 1d it upright.

3. A well-tu ing safety app1ia1tce'comprising a stock adapted to' pass into the well casing, and having means for connecting it with the tubing, said stock having inclined-plane seats in its outer wall deepening downward; gripper slips slidably mounted on said seats and so proportioned as to clear or to engage its casing walls according as they move down or up on their seats; and means for releasably holding said gripper slips down, and-moving them up when released, consisting of rods connected with the slips, aliftable head,stem within,

the stock, trip arms hinged to said head stem and having their outer ends through holes in the stock and engaging the lower end of the slip rods, and s rings around said slip rods to throw the slips-up when released.

4. A well-tubing safety appliance comprising a stock adapted to pass into the well assing' casing and having means for connecting Q -1130' With-the tubing, said stock having its outer face formed with bosses adapted to fit the inner Wall of the casing, the rest of said face being of'smaller circumference Wherehy channelsrare left between said face on each side of the bosses andthe Well casing, the bosses of said stock having their faces formed with inclined plane seats deepening downward; gripper slips slidahly' mounted on said seats and so proportioned as to clear or to engage the casing Walls according as they move down or u on their seats; and means for releasably olding said gripper slips doivn, and moving them up when released, consisting of rods connected with the slips, a-liftahle head stern Within the stock,

trip arms hinged to said head stem and having their outer ends passing through holes in the stock and engaging the lower end of the slip rods, and springsaround the slip 29 rods to throw the slips up whcnreleascd.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. SAMUEL ALLEN GUlBERSON, JR. WVitnesses: I

J. A. SMALL, B. L. VVYLLIE. 

